Design of wide viewing angle liquid crystal display

In order to realize wide viewing angle of liquid crystal display,this paper presents the design principle and method of one 54.6cm(21.5in)liquid crystal display with wide contrast viewing angle of liquid crystal panel and wide brightness viewing angle of backlight unit.First,through the introduction of structure and design of fringe field switching mode,the principle of wide contrast viewing angle of this liquid crystal panel is explained.Then the design method of brightness viewing angle of backlight unit is introduced,a variety of combinations of optical films were tested and optimal combination with biggest brightness viewing angle was chosen.Test data of practically-fabricated liquid crystal modules show the contrast viewing angle can achieve 90°/90°/90°/90°,and one half brightness viewing angle in horizontal direction can achieve 60°,corresponding to the data of luminance uniformity-angular dependence 1.20.This liquid crystal display has obvious advantages on contrast and brightness viewing angle compared with similar products.